Site looks good, but you might want to hold off "launching" until you've got a few more themes up there. As is, I'm assuming the HN audience is your desired customer base? First impressions are big, and if everyone sees a barren wasteland of a themes market, you're probably not going to be first on their mind when they're looking to spend money. My suggestion is to find as many bootstrap developers as you can, let them know about your site and it's payout split. Try relaunching with 20+ themes. Keep up the good work!